1. Abitibi Geophysics
2. CGG
3. Dawson Geophysical
4. EGS Survey
5. Eon Geosciences
6. Fugro
7. Halliburton
8. Nuvia Dynamics Inc. by Qualcomm
9. PGS by Xebia
10. Ramboll Group A/S
11. SAExploration
12. Schlumberger Limited
13. Shearwater Services
14. TGS
15. Weatherford International